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Commit 346f5824 by Douglas Barbosa Alexandre
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Use subqueries instead of joins to migrate subscriptions

parent 9dfbe1d2
Showing with 24 additions and 39 deletions
db/migrate/20161031174110_migrate_subscriptions_project_id.rb
......@@ -5,50 +5,35 @@ class MigrateSubscriptionsProjectId < ActiveRecord::Migration
DOWNTIME_REASON = 'Subscriptions will not work as expected until this migration is complete.'
def up
if Gitlab::Database.mysql?
execute <<-EOF.strip_heredoc
UPDATE subscriptions
INNER JOIN issues ON issues.id = subscriptions.subscribable_id AND subscriptions.subscribable_type = 'Issue'
SET subscriptions.project_id = issues.project_id;
EOF
execute <<-EOF.strip_heredoc
UPDATE subscriptions
INNER JOIN merge_requests ON merge_requests.id = subscriptions.subscribable_id AND subscriptions.subscribable_type = 'MergeRequest'
SET subscriptions.project_id = merge_requests.target_project_id;
EOF
execute <<-EOF.strip_heredoc
UPDATE subscriptions
INNER JOIN labels ON labels.id = subscriptions.subscribable_id AND subscriptions.subscribable_type = 'Label'
INNER JOIN projects ON projects.id = labels.project_id
SET subscriptions.project_id = projects.id;
EOF
else
execute <<-EOF.strip_heredoc
UPDATE subscriptions
SET project_id = issues.project_id
execute <<-EOF.strip_heredoc
UPDATE subscriptions
SET project_id = (
SELECT issues.project_id
FROM issues
WHERE issues.id = subscriptions.subscribable_id
AND subscriptions.subscribable_type = 'Issue';
EOF
WHERE issues.id = subscriptions.subscribable_id AND subscriptions.subscribable_type = 'Issue'
)
WHERE subscriptions.subscribable_type = 'Issue';
EOF
execute <<-EOF.strip_heredoc
UPDATE subscriptions
SET project_id = merge_requests.target_project_id
execute <<-EOF.strip_heredoc
UPDATE subscriptions
SET project_id = (
SELECT merge_requests.target_project_id
FROM merge_requests
WHERE merge_requests.id = subscriptions.subscribable_id
AND subscriptions.subscribable_type = 'MergeRequest';
EOF
WHERE merge_requests.id = subscriptions.subscribable_id AND subscriptions.subscribable_type = 'MergeRequest'
)
WHERE subscriptions.subscribable_type = 'MergeRequest';
EOF
execute <<-EOF.strip_heredoc
UPDATE subscriptions
SET project_id = projects.id
execute <<-EOF.strip_heredoc
UPDATE subscriptions
SET project_id = (
SELECT projects.id
FROM labels INNER JOIN projects ON projects.id = labels.project_id
WHERE labels.id = subscriptions.subscribable_id
AND subscriptions.subscribable_type = 'Label';
EOF
end
WHERE labels.id = subscriptions.subscribable_id AND subscriptions.subscribable_type = 'Label'
)
WHERE subscriptions.subscribable_type = 'Label';
EOF
end
def down
......
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